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So, welcome to the lecture Interventional Medical Image Processing.

Unfortunately I wasn't able to teach last week, so we had some kind of refresher courses

on linear algebra and on homogeneous coordinates, two concepts that we are going to use from

now on without any comment.

Okay.

you this should have been just a refresher course last week. Today we want to start with

the topics we want to consider. And the first question is, what is intervention? Who is

the lecturer actually? My name is Joachim Horneger for those of you who don't know

me. I'm in charge of the pattern recognition lab and my major application field is medical

image processing as you might know. And I'm guiding you through the summer semester lecture

and I hope that I can teach most of the lectures for you. They will be recorded. You can also

have access to previous lectures or lectures of previous years. And as I said, we want

to adjust this semester a little bit the topics to make the lecture more up to date regarding

current developments in the field. The question now is why is the lecture called interventional

medical image processing? In the winter semester I teach diagnostic medical image processing

and the summer interventional. So what's the difference? Diagnostic medical image processing

basically means there is a highly paid technician. Welcome. You can sit here if you want.

Don't smile, it's recorded. There is a technician and the technician puts the patient into the

system. The patient gets an x-ray image, the patient gets a CT image, the patient gets

an MR image. Then the technician sits there and adjusts the image quality and works on

the pictures. An hour later or the next day or whenever a radiologist will sit down and

do a diagnosis on the basis of these images. In interventional that was the diagnostic

part. We talked about image pre-processing in winter. We talked about three-dimensional

reconstruction. We talked about combining different images in a joint coordinate system.

The summer semester we will look into a completely different application domain. The imaging

system, the imaging device will be used by the doctor himself. So the doctor will use

the system while he is treating the patient. So he's doing surgery and using the medical

imaging equipment during surgery. Or he is doing an intervention in the sense that he's

fixing up something in the cerebral vessel system in the brain without surgery but by

just going through the vessels and using x-ray to see where he is and what he actually does.

You can imagine this type of procedure requires a completely different system. I mean if a

CT system breaks and you have to reboot the system in a diagnostic phase, you lose some

time but it's not life-threatening for the patient. You have to tell him, look we have

to do it again. In an intervention if you know the catheter is right in the coronary

arteries of the heart and all over a sudden the x-ray system does not deliver any pictures

anymore, you are there with your catheter and you do not see anymore what you are actually

doing. So reliability, safety is an issue. Or speed, computational power, the computational

speed is an issue. Also the user interface is an issue. I mean you don't have a highly

qualified technician but you have a poorly technically equipped doctor running the system

and he wants to have one button, right? It's just confidential information. I'm doing this

type of jokes all the time. You will get used to it. So the system has to be very easy to

access because the doctor does not want to concentrate on the interface to the x-ray

machine but he wants to concentrate on the patient and how the patient can be properly

treated.

So there are a few demands which are completely different in the interventional setup like

in the diagnostic setup. Good. A few questions up front. Can we shift the time for the lecture?

The answer is no. Yeah? So maybe you have discussed this last, did you see this slide

last week already? Okay so I can skip that. Anyways. Good. And then let me just check

whether my hard disk is already up here. It's still not showing my disk. That's weird. But